Answer to Question #73281 in Inorganic Chemistry for charu

Question #73281
Explain why pi-pi* transitions are the most useful transition in UV-Vis spectroscopy?
1
Expert's answer
2018-02-07T15:17:08-0500
There are several possible electronic transitions in molecules. According to the molecular orbital theory, the energy levels of a molecule are located in such order: σ, π, n, π*, σ*. The most common transitions are σ-σ*, π-π*, n-π*. The σ-σ* transitions have the biggest energy difference which means that this the absorbed photon does not fall in the UV-Vis range (the wavelength is too small). The π-π* and n-π* transitions both belong to the UV-Vis range. The π-π* transitions are more useful than the n-π* transitions because the n-π* transitions correspond to the nonbonding electrons in the molecule, whereas the π-π* transitions correspond to the electrons of the conjugate system.

Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!

Comments

Assignment Expert
10.09.19, 13:02

Dear Rishika Chakraborty, You're welcome. We are glad to be helpful. If you liked our service please press like-button beside answer field. Thank you!

Rishika Chakraborty
10.09.19, 10:26

Thank you sir

Mallikarjun Kalshetti
26.03.18, 11:35

Nice

Assignment Expert
24.03.18, 13:26

Dear Mallikarjun Kalshetti, You're welcome. We are glad to be helpful. If you liked our service please press like-button beside answer field. Thank you!

Mallikarjun Kalshetti
24.03.18, 11:47

Nice sir

Leave a comment

Ask Your question

LATEST TUTORIALS
New on Blog
APPROVED BY CLIENTS